SLUSAR9D December   2011  – December 2021 TPS28225-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Undervoltage Lockout (UVLO)
      2. 7.3.2 Output Active Low
      3. 7.3.3 Enable/Power Good
      4. 7.3.4 3-State Input
      5. 7.3.5 Bootstrap Diode
      6. 7.3.6 Upper and Lower Gate Drivers
      7. 7.3.7 Dead-Time Control
      8. 7.3.8 Thermal Shutdown
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Switching the MOSFETs
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.6 Upper and Lower Gate Drivers

The upper and lower gate drivers charge and discharge the input capacitance of the power MOSFETs to allow operation at switching frequencies up to 2 MHz. The output stage consists of a P-channel MOSFET providing source output current and an N-channel MOSFET providing sink current through the output stage. The ON state resistances of these MOSFETs are optimized for the synchronous buck converter configuration working with low duty cycle at the nominal steady state condition. The UGATE output driver is capable of propagating PWM input pulses of less than 30-ns while still maintaining proper dead time to avoid any shoot through current conditions. The waveforms related to the narrow input PWM pulse operation are shown in Figure 7-5.